Where does “firușor” come from?

firușor (Romanian) comes from Romanian fir, from Latin fīlum, from Proto-Italic fī(s)lom, from Proto-Indo-European gʷʰiH-(s-)lo-.

Ancestry of “firușor”, step by step

StepLanguageWordMeaning
1Romanianfirthread, string, filament, wire; a hair
2Latinfīlumthread, string, filament, fiber
3Proto-Italicfī(s)lom
4Proto-Indo-EuropeangʷʰiH-(s-)lo-
Every word from Proto-Indo-European gʷʰiH-(s-)lo-Every word from Proto-Italic fī(s)lomEvery word from Latin fīlum
firușor — Etymology, Origin & Word History | Etymology Explorer